EPR detection of foods preserved with ionizing radiation

Stachowicz, W.; Burlinska, G.; Michalik, J.

doi:10.1016/s0969-806x(98)00066-8

Cited by 13 publications

(10 citation statements)

References 5 publications

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“…The above signals are also present in the EPR spectra of irradiated samples, where the amplitude of the natural singlet increases after irradiation and the intensity of the Mn 2+ sextet is radiation independent, if observed (Dodd and Swallow, 1985). After irradiation, two weak satellite lines appear, situated at the left and right of the native signal (Raffi and Agnel, 1989;Glidewell et al, 1996;Stachowicz et al, 1996), which are attributed to cellulose free radicals, generated by gamma irradiation (Raffi and Agnel, 1989). This European Standard EN 1787 has been validated for pistachio shells, paprika powder and strawberry seeds of fresh strawberry.…”

Section: Introductionmentioning

confidence: 91%

Preparation and applicability of fresh fruit samples for the identification of radiation treatment by EPR

Aleksieva

2009

Radiation Physics and Chemistry

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Section: Introductionmentioning

confidence: 91%

Preparation and applicability of fresh fruit samples for the identification of radiation treatment by EPR

Aleksieva

2009

Radiation Physics and Chemistry

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“…The EPR signals recorded after exposure to ionizing radiation are stable, intense and speci¢c enough, but their stability depends on storage conditions (moisture, compacity, etc.). 643 A new EPR draft protocol has been proposed for the detection of irradiated shell¢sh, 644 and the method can also be applied to lobster as described by an international collaborative blind trial. 645 The same technique constitutes an indicator of the exposure of waters to ionizing radiation from radionuclides stored in concrete containers or freed in nuclear accidents or underwater eruption: the signals used are those detected in bones and the skeletons of molluscs.…”

Section: Foodsmentioning

confidence: 99%

7 Radiation chemistry

Belloni

Delcourt

Houée-Levin⊥

et al. 2000

Annu. Rep. Prog. Chem., Sect. C

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We try in this review to survey advances in all the aspects of Radiation Chemistry (the effects of high energy or ionizing radiation), both basic and applied, made during the period 1995^1999, after the last report issued at the end of 1994. 1 Classically, two main classes of studies are relevant. The ¢rst one includes the primary phenomena induced by the interaction of high-energy radiation with a chemical system. The way the energy is spatially deposited is indeed highly nonhomogeneous and depends on the type of radiation considered. Mutual reactions between the primary species produced also depend on their initial spatial distribution, and therefore on the energy absorption pattern. The kinetic aspects derive directly from the initial events following radiation absorption and thus, when observed at times as short as possible, give useful information on the early energy distribution for each of the radiation types, X-and g-photons, electrons and heavy particles, and, on the in£uence of their intensity and energy per particle.The second class of studies utilizes the background knowledge of radiation chemistry to generate and then to observe the fate of chemical transient species known to be involved in very important chemical or biochemical processes. Numerous data, such as the nature of reaction products, the absolute rate constants, the sequence of elementary reactions constituting a mechanism, and the thermodynamic and spectroscopic properties of short-lived species have been attained. This kind of study of transients and reaction mechanisms, which can be approached only by pulse techniques (essentially pulse radiolysis or laser photolysis, each with its speci¢c advantages), constitutes the new ¢eld of fast to ultrafast chemistry. It concerns extended domains of physical, organic, inorganic, and bio-chemistry. Moreover, the understanding of mechanisms is quite helpful in suggesting new ways of synthesis or degradation induced by irradiation and is now extensively used in developing various speci¢c processes in applied chemistry. The number of studies on the chemical mechanisms and in applied radiation chemistry constitutes an increased fraction of the total publications in radiation chemistry, which we estimate to be around 4000 over the period considered (almost constant compared to the preceding 5-year

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“…Electron paramagnetic resonance (EPR) dosimetry is a method of quantitating the radiation-induced radicals, making it possible to measure the radiation dose absorbed by the irradiated material [1][2][3][4][5][6][7]. Owing to this feature, EPR-based dosimetry has been established for many applications such as radiation processing [8], identification of irradiated foods [9,10], radiation oncology [11], evaluation of radiation risk [12], and archeological dating [13].…”

Section: Introductionmentioning

confidence: 99%

Potential Use of Environmental Biological Samples for Retrospective Electron Paramagnetic Resonance Dosimetry of Radiation Accidents

Lin

Hsu

et al. 2020

Applied Sciences

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Retrospective dosimetry is one of the most important tools of accident dosimetry for environmental dose estimation when large-scale radiological incidents and nuclear mass-casualty events occur. Electron paramagnetic resonance (EPR) dosimetry is a physical method for the retrospective assessment of absorbed dose based on the measurement of stable radiation-induced radicals in materials. Different from the fast disappearance of radials in aqueous systems, the radials can persist indefinitely in some organized matrices. Therefore, environmental materials contained in creatures from sea or land can be potentially used as environmental dosimeters for a retrospective dose analysis. This study aims to assess the EPR signals of free radicals from environmental biological samples, potentially for the retrospective dose estimation. The evaluated samples involve ox bone, cyclina shell, clam shell, chitin from squid, and human tissue (enamel and fingernail). First, we dehydrate and grind these materials to the powder with different sizes. Subsequently, all materials were irradiated with different doses ranging from 5 Gy to 50 Gy using 6 MV linear accelerator, and EPR spectra of these materials were obtained from the calculation of peak-to-peak amplitudes. The dose-response curve of EPR signals versus irradiated dose for the six materials shows good linearity (R2~0.99). For the grain-size experiment, the ox bone and tooth with 0.5 mm, the chitin with 0.1 mm, and the others with 1 mm have the strongest signal. For the storage temperature experiment, the optimal temperature of storage is at −20 °C for tooth, fingernail, ox bone, and chitin, at 45 °C for clam shell and cyclina shell where the signal fading is minimal. In conclusion, the developed dose-response curves of the six materials may potentially help a fast, rough retrospective dose reconstruction under the environment when radiation accidents occur.

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EPR detection of foods preserved with ionizing radiation

Cited by 13 publications

References 5 publications

Preparation and applicability of fresh fruit samples for the identification of radiation treatment by EPR

Preparation and applicability of fresh fruit samples for the identification of radiation treatment by EPR

7 Radiation chemistry

Potential Use of Environmental Biological Samples for Retrospective Electron Paramagnetic Resonance Dosimetry of Radiation Accidents

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